body {
    background: #121214;
    color: #e1e1e6;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.card {
    background: #202024;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    text-align: center;
    border: 1px solid #04d361;
}
h1 {
    color: #04d361;
    margin-top: 0;
}